Edging-machine.



A. A. ARNOLD.

EDGING MACHINE,

APPLICATION FILED NOV. 24. 1911.

" LB'OAQG Patented May 6,1919.

2 SHEETS-SHEET E.

My ,WT W H.

A. A. ARNOLDL E DGING MACHINE.

I u APPLICATION FILED NOV. 24, 19]]. L3 Patented May 6, 1919,.

2 SHEETS- SHEET '2.

3 mm H-HHRNOLD N N. WWM/KM au o-M1 5 E Mom-us PETERS 60.. nnom-u'mm.W451, aurora 0. cv

TlNliTlEll) STATES PATENT @Ffllffllii.

ARTHUR A. ARNOLD, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR TO AMERICANOPTICAL COMPANY, OF SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY ASSOCIA-TION OF MASSACHUSETTS.

EDGING-MAGHINE.

Patented May 5, 11919.

Application filed November 24, 1917. Serial No. 203,780.

To all whom it may concern Be it known that I, ARTHUR A. ARNOLD, acitizen of the United States, residing at Southbridge, in the county ofWVorcester and State of Massachusetts, have invented certain new anduseful Improvements in Edging-Machines, of which the following is aspecification.

This invention relates to new and useful improvements in edging machinesand has particular reference to an improved machine particularly adaptedfor use in finishing the edges of ophthalmic lenses.

The leading object of the present invention is the provision of new andimproved means for imparting various speeds to the mechanism employedfor grinding the edges of the lenses, and at the same time includesmeans whereby the various speeds are manually operated.

Another object of the invention is the provision of manually operatedmeans whereby the mechanism can be readily operated at a low rate ofspeed or at a high rate of speed according to the character of thelenses being ground.

With the above and other objects in view, the invention consists in thenovel features of construction and the combination and arrangement ofparts hereinafter more fully set forth, pointed out in the claims andshown in the accompanying drawings, in

which Figure 1 is a side elevation of an edging machine constructed inaccordance with my invention.

Fig. 2 is a top plan view of the machine.

Fig. 3 is a detail perspective View of speed adjusting mechanismillustrating a slightly modified form of the same, and

Fig. 4 is a similar View illustrating still another form of the speedadjusting mechanism.

In the drawings, in which similar characters of reference are employedto denote corresponding parts throughout the several views, the numeral1 designates the base or tub of the edging machine, having risingtherefrom the side flanges 2 provided with the bearings 3 serving toslidably and rotatably support the spindle or shaft 4: bearing the grindstone 5. Secured to the forward portion of the tub is a suitable lensholding and rotating mechanism 6 for securing in position and rotatingagainst the stone the lenses 7, while disposed at the rear of themachine is a driven shaft 8 provided with the barrel cam 9, theforegoing parts being but briefly described inasmuch as their specificconstruction forms no essential part of my present invention.

As has been mentioned, the shaft 4 for the stone is both rotatable inits bearings and also slidable longitudinally therein, this slidingbeing effected by the shift lever 10 having at one end the yoke 11pivotally secured to the collar 12, which is loosely mounted on theshaft and held from rotation thereon as by the fixed collar 13 or othersuitable device. The opposite end of the lever 10 is provided with aroller riding in the groove 14: of the barrel cam, the lever beingintermediately pivotally supported so that movement imparted to the oneend through engagement of the barrel cam and roller will rock the leverand thus cause its opposite end to suitably shift the shaft 4.

N ow that the outline of the general machine has been fully set forth Iwill proceed to set forth the position and operation of my improvedspeed adjuster with respect to the main portion of the machine. Mountedupon the outer end of the shaft 4 is a worm 15 which meshes with a gear16 upon the end of a longitudinal shaft 17 disposed at one side of themachine, said shaft having one end mounted within the bracket 18, whichalso assists in supporting the gear 16, while the other end of the shaftis supported in the bracket 19 at the end of the machine. Extending outfromone side of the machine is the transverse shaft 8, which supportsupon its outer end a friction disk 21 and mounted upon the shaft is acoil spring 22 which bears against the rear face of the 'disk in orderthat the same will be normally held in close engagement with thefriction pulley 23. This shaft 8 extends across the rear of the machineand is supported within suitable bearings as illustrated at 24.

The friction pulley 23 is slidably mounted upon the shaft 17 and rotatedwith the shaft through the medium ofthe longitudinal key and is operatedby means of the yoke 26, the ends of which are engaged with in thegroove 27 formed in the sleeve 28 which carries the friction pulley 23.The outer end of the arm 29, of the yoke, is pivotally mounted upon thebase of the n1achine as shown at 30, said arm being moved laterally bymeans of the longitudinal lever 31 the outer end of which is providedwith a handle member 32. This lever 31 is pro vided adjacent the handlewith a plurality of notches 33 adapted for engagement with a pin 34extending from the body of the machine, whereby the friction pulley 23can be readily adjusted on the shaft 17 to impart various speed changesto the shaft 8. From this it will be apparent that by shifting the leverlongitudinally it will impart a lateral movement to the arm 29 and shiftthe friction pulley over the surface of the disk 21 to obtain variousspeeds which are imparted to the shaft 8. It will be understood that asthe pulley is moved in toward the center of the disk 2-1 a higher rateof speed will be imparted to the shaft 8 while as the pulley i moved outtoward the outer edge of the disk a lower rate of speed will be impartedto the shaft.

In Fig. 3 I have illustrated a slightly modified form of the inventionwherein the disk 21 is secured to the end of the shaft 17, while thefriction pulley 23' is secured to the end of the shaft 8, but theoperation and results are practically the same as in the preferred formof the invention. The friction pulley 23 is operated by means of apivoted lever 31 the lower end of which is provided with a fork or yoke35 which engages the sleeve 36 of the pulley 23 for imparting a slidingmovement to the pulley. The lever 31 is provided adjacent its up per endwith a spring actuated catch 37 adapted for engagement with the severalnotches 38 formedin the outer face of the bracket 39 which supports theouter end of the shaft 8.

From the above it will be readily appar ent that by actuating the lever31 the ad justment of speed can be readily carried out and the leversecurely held in its adjusted position by means of the spring catch 37.Furthermore it will be apparent from the above that the manner ofapplying the disk and friction pulley makes comparatively littledifference in the operation of the machine.

In Fig. 4 I have illustrated another form of the invention in which thepositions of the worm 15 and the gear 16, and the disk 21 and pulley 23are reversed, that is to say the disk 21 is mounted on the drive shaft 4and the gear 16 is mounted upon the shaft 8. In this form of theinvention a stub shaft 40 is mounted on the base 1 and pivotally securedto the outer end of this shaft 40 is the arm 29 the upper forked end ofwhich engages the sleeve of the friction pulley 21 in order to shift thepulley upon the shaft 17. At the rear end of the shaft 17 the gear 16and the worm 15 are inclosed within a suitable casing as shown at 4:1,said casing being secured to the base in any suitable manner. In orderthat the lever 29 may be readily actuated to adjust the pulley 23 overthe face of the disk 21 an actuating lever 42 is loosely connected tothe lever or arm 29, the outer end of which is provided with a handle4L3 whereby the same can be readily actuated. In order to retain thelever A2 in an adjusted position a plurality of notches 44 are formed inone edge thereof and are adapted for engagement with a pin 45 secured tothe base 1 of the machine.

From the above description taken in connection with the accompanyingdrawings it will be readily apparent that I have provided a novelattachment for edging machines whereby the machine can be operated atthree different speeds, said speeds being changed at the will of theoperator. It will also be noted that while I have shown and described myimproved speed changing device as applied to an edging machine it willbe understood that the same may be readily applied to any machine towhich the same is applicable.

I claim:

1. An edging machine including a drive shaft, a driven shaft, a disk onthe driven shaft, a longitudinal shaft adjacent the ends of the abovementioned shafts, means connecting one end of the longitudinal shaftwith the drive shaft, a friction pulley on the other end of thelongitudinal shaft, a lever loosely connected with the pulley, an actuating lever connected with the first lever and adapted to be manuallyoperated for adjusting the friction pulley over the face of the diskwhereby to drive the driven shaft at different rates of speed, and meansfor retaining the actuating lever in various adjusted positions.

2. An edging machine including a drive shaft, a driven shaft, a disk onthe driven shaft, a longitudinal shaft adjacent the ends of the abovementioned shafts, means connectin one end of the longitudinal shaft withthe drive shaft, a friction pulley on the other end of the longitudinalshaft, a lever loosely connected with the pulley and adapted to bemanually operated for adjusting the pulley over the face of the diskwhereby to drive the driven shaft at different rates of speed, andco-acting means carried by the lever and body of the machineforretaining the lever in various adjusted positions.

In testimony whereof I have affixed my signature, in presence of twowitnesses.

ARTHUR A. ARNOLD.

Vitnesses:

H. E. COLEMAN, A. S. CANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

